public String soundex()

in src/main/java/org/apache/commons/codec/language/Soundex.java [312:340]

• 29 lines of code
• 11 McCabe index (conditional complexity)

    public String soundex(String str) {
        if (str == null) {
            return null;
        }
        str = SoundexUtils.clean(str);
        if (str.isEmpty()) {
            return str;
        }
        final char[] out = { '0', '0', '0', '0' };
        int count = 0;
        final char first = str.charAt(0);
        out[count++] = first;
        char lastDigit = map(first); // previous digit
        for (int i = 1; i < str.length() && count < out.length; i++) {
            final char ch = str.charAt(i);
            if (this.specialCaseHW && (ch == 'H' || ch == 'W')) { // these are ignored completely
                continue;
            }
            final char digit = map(ch);
            if (digit == SILENT_MARKER) {
                continue;
            }
            if (digit != '0' && digit != lastDigit) { // don't store vowels or repeats
                out[count++] = digit;
            }
            lastDigit = digit;
        }
        return new String(out);
    }